Refactor and improvements

This PR fixes the following things from #47 :

We need to allow users to have the server listen on several ips/ports (an exampleis both ipv4 and ipv6 support)
Abstract the server away in its own class

On top of that it introduces a configuration class and some parts have been refactored.

Also added missing deps based on dep checker report.

ekinhbayar / gitamp